Borla Attack vs Muffler Delete???
You can get them to stay open by rotating them open by hand, then moving the end of the spring two positions. If it doesn't stay open the first time, move the spring end back and go two positions in the other direction. You can do all of this by hand, no tools required. It is also reversible if the urge so suits.
2012 Mineral Gray Jeep Grand Cherokee SRT8
BT Catch Can | Trinity 93 Tune | "392 Hemi" Covers | Resonator Delete | Ported TB | Injen Intake | Debadged / Re-Badged | Chrome Wrapped by ME!